Diving aid



FIG. 1 is a perspective view of a diving aid showing our design;

FIG. 2 is a top plan view of our design;

FIG. 3 is a rear side view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side thereof;

FIG. 6 is a front side view thereof; and,

FIG. 7 is a left side view thereof. 

The ornamental design for a diving aid, as shown and described. 